JPS6268763A - Nozzle construction for ink jet head - Google Patents

Nozzle construction for ink jet head

Info

Publication number
JPS6268763A
JPS6268763A JP20839985A JP20839985A JPS6268763A JP S6268763 A JPS6268763 A JP S6268763A JP 20839985 A JP20839985 A JP 20839985A JP 20839985 A JP20839985 A JP 20839985A JP S6268763 A JPS6268763 A JP S6268763A
Authority
JP
Japan
Prior art keywords
nozzle
diameter
outflow
straight
jetting direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20839985A
Other languages
Japanese (ja)
Inventor
Satoshi Sekimoto
関本　智
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP20839985A priority Critical patent/JPS6268763A/en
Publication of JPS6268763A publication Critical patent/JPS6268763A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/1433—Structure of nozzle plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14475—Structure thereof only for on-demand ink jet heads characterised by nozzle shapes or number of orifices per chamber

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

PURPOSE:To contrive stabilization of the jetting direction of ink droplets jetted from a nozzle, by providing an outlet part with an aperture part having a chamfer in an amount of not less than 1/10 times the diameter of a straight part. CONSTITUTION:A nozzle 1 comprises an inflow part 2, a straight part (approaching run part) 3 and an outflow part 4, and an ink fed through the inflow part 2 under pressure is passed through the straight part 3, and is jetted from the outflow part 4. An aperture 5, 5' on the side of the outflow part is chamfered, and the chamfering amount l and the diameter D of the nozzle are so set as to determine a stable jetting direction. The jetting direction is stabilized when the chamfering amount is not less than 1/10 times the diameter D of the nozzle. The nozzle can be chamfered by any of electropolishing, chemical polishing and the like.

Description

【発明の詳細な説明】 １１ｊｌ！Ａ−先野 本発明は、インクジェット記録装置におけるインクジェ
ットヘッドのノズル構造に関する。[Detailed Description of the Invention] 11jl! A-Senno The present invention relates to a nozzle structure of an inkjet head in an inkjet recording apparatus.

従来ｌ佇 インクジェット記録装置においては、インクジェットヘ
ッドのインク滴噴射方向の安定化が記録装置の印字品質
、ヘッドの歩留り等に大きく影響し、改良が加えられて
いる。本山廓人においてもインクジェットヘッドのノズ
ル出口部開口径の面取りを行って噴射の安定化を図って
いるが面取り量が小さいため噴射方向の安定性が悪く、
コスト的に不利である。In conventional inkjet recording apparatuses, stabilization of the direction in which ink droplets are ejected from the inkjet head greatly affects the printing quality of the recording apparatus, the yield of the head, etc., and improvements have been made. At Motoyama Kaijin, the diameter of the nozzle exit opening of the inkjet head is chamfered to stabilize jetting, but because the amount of chamfering is small, the stability of the jetting direction is poor.
It is disadvantageous in terms of cost.

なお、インクジェットヘッドのノズル部に面取りを施し
てインク滴の噴射方向を安定化させようとするものは、
例えば、特開昭５１−２４１２９号公報において公知で
あるが、このものは、帯電量制御型ノズル穴の開き角を
６０°〜１２０°　（内部）に規定しているのみで出口
部の面取りについては何ら開示されておらず、ノズルの
ストレート部前後における開口径寸法に規定はなく、面
取り量が少ないと安定性に欠ける欠点がある。In addition, those that attempt to stabilize the jetting direction of ink droplets by chamfering the nozzle part of the inkjet head,
For example, Japanese Patent Laid-Open No. 51-24129 is known, but this only specifies the opening angle of the charge control type nozzle hole to be 60° to 120° (inside), and the chamfering of the outlet part is is not disclosed at all, and there are no regulations regarding the opening diameter dimensions before and after the straight part of the nozzle, and if the amount of chamfering is small, there is a drawback that stability is lacking.

且的 本発明は、上述のごとき実情に鑑みてなされたもので、
特に、インクジェット記録装置におけるインクジェット
ヘッドのノズルより噴射されるインク滴の噴射方向の安
定化を図ることを目的としてなされたものである。The present invention was made in view of the above-mentioned circumstances, and
In particular, this was done with the aim of stabilizing the ejection direction of ink droplets ejected from a nozzle of an inkjet head in an inkjet recording apparatus.

一構一成一 本発明は、上記目的を達成するため、直線状のストレー
ト部と、該ストレート部に続く出口部を有するインクジ
ェットヘッドノズルにおいて、前記出口部に前記ストレ
ート部の径に対して１／１０以上の面取りを持つ開口径
部を有することを特徴としたものである。以下、本発明
の実施例について説明する。In order to achieve the above object, the present invention provides an inkjet head nozzle having a linear straight part and an outlet part following the straight part, in which the outlet part has a diameter that is 1/1/2 with respect to the diameter of the straight part. It is characterized by having an opening diameter portion with ten or more chamfers. Examples of the present invention will be described below.

第１図は、本発明によるノズル構造の一実施例を説明す
るための断面図で、ノズル１は、流入部２、ストレート
部（助走部）３．流出部４から構成され、周知のように
、流入部２より圧入されたインクはストレート部３を通
して流出部４より噴射される。５，５“は流出部側開口
径で、本発明においては、図示のように、流出部側開口
径は面取りされており、この開口径の面取り量ｌとノズ
ル径りとによって安定した噴射方向を決定するようにし
ている。FIG. 1 is a cross-sectional view for explaining one embodiment of a nozzle structure according to the present invention, in which a nozzle 1 includes an inflow section 2, a straight section (run-up section) 3. It is composed of an outflow section 4, and as is well known, ink that is press-fitted from the inflow section 2 passes through a straight section 3 and is ejected from the outflow section 4. 5,5" is the opening diameter on the outflow side. In the present invention, the opening diameter on the outflow side is chamfered as shown in the figure, and a stable injection direction is achieved by the chamfering amount l of this opening diameter and the nozzle diameter. I am trying to decide.

第２図は、ノズル径りが３０μｍのノズルにおける流出
部側面取り量ｌ　（μｌｌ１）と噴射角度の関係を示す
実験例で、この結果から２．５μｍ以上の面取りを行う
と噴射方向が安定することが解る。Figure 2 is an experimental example showing the relationship between the side chamfering amount l (μll1) of the outflow part and the injection angle in a nozzle with a nozzle diameter of 30μm.From this result, the injection direction becomes stable when the chamfer is 2.5μm or more. I understand.

また、２５．５μｍノズル及びその他のノズルについて
も実験したが、その結果、ノズル径りの１７１０以上の
面取りをすると噴射方向が安定することが判明した。尚
、ノズルの面取り方法には電解研磨又は化学研磨等ある
がどの方法でもよい。Experiments were also conducted with a 25.5 μm nozzle and other nozzles, and the results revealed that the injection direction was stabilized when the nozzle diameter was chamfered to a diameter of 1710 mm or more. Incidentally, the nozzle chamfering method includes electrolytic polishing, chemical polishing, etc., and any method may be used.

■ 以上の説明から明らかなように、本発明によると、噴射
方向が安定し、歩留りがよく、偏向電極部の汚れ等がな
く、印字品質の安定したノズルを提供することができる
。(2) As is clear from the above description, according to the present invention, it is possible to provide a nozzle with a stable jetting direction, a high yield, no dirt on the deflection electrode portion, and stable printing quality.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本発明によるノズル構造の一実施例を説明す
るための断面図、第２図は、ノズル径をパラメータとし
た時の流出部側面取り量と噴射角度の関係を示す実験例
図である。 １・・・ノズル、２・・・流入部、３・・・ストレート
部、４・・・流出部、５．５°・・・流出部側開口径。Fig. 1 is a cross-sectional view for explaining one embodiment of a nozzle structure according to the present invention, and Fig. 2 is an experimental example showing the relationship between the amount of side chamfering of the outflow section and the injection angle when the nozzle diameter is used as a parameter. It is. DESCRIPTION OF SYMBOLS 1... Nozzle, 2... Inflow part, 3... Straight part, 4... Outflow part, 5.5°... Outflow part side opening diameter.

Claims (1)

【特許請求の範囲】[Claims] 直線状のストレート部と、該ストレート部に続く出口部
を有するインクジェットヘッドノズルにおいて、前記出
口部に前記ストレート部の径に対して１／１０以上の面
取りを持つ開口径部を有することを特徴とするインクジ
ェットヘッドのノズル構造。An inkjet head nozzle having a linear straight part and an outlet part following the straight part, characterized in that the outlet part has an opening diameter part with a chamfer of 1/10 or more of the diameter of the straight part. The nozzle structure of the inkjet head.
JP20839985A 1985-09-20 1985-09-20 Nozzle construction for ink jet head Pending JPS6268763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20839985A JPS6268763A (en) 1985-09-20 1985-09-20 Nozzle construction for ink jet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20839985A JPS6268763A (en) 1985-09-20 1985-09-20 Nozzle construction for ink jet head

Publications (1)

Publication Number Publication Date
JPS6268763A true JPS6268763A (en) 1987-03-28

Family

ID=16555607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20839985A Pending JPS6268763A (en) 1985-09-20 1985-09-20 Nozzle construction for ink jet head

Country Status (1)

Country Link
JP (1) JPS6268763A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518700A2 (en) * 1991-06-14 1992-12-16 Tektronix, Inc. Ink jet heads less susceptible to rectified diffusion and methods for preparing them
JPH06286129A (en) * 1992-02-20 1994-10-11 Seikosha Co Ltd Ink jet head
US6290331B1 (en) 1999-09-09 2001-09-18 Hewlett-Packard Company High efficiency orifice plate structure and printhead using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518700A2 (en) * 1991-06-14 1992-12-16 Tektronix, Inc. Ink jet heads less susceptible to rectified diffusion and methods for preparing them
JPH06286129A (en) * 1992-02-20 1994-10-11 Seikosha Co Ltd Ink jet head
US6290331B1 (en) 1999-09-09 2001-09-18 Hewlett-Packard Company High efficiency orifice plate structure and printhead using the same

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